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PLC system

a technology of plc system and plc module, which is applied in the direction of electrical programme control, program control, instruments, etc., can solve the problems of reducing the performance of the entire plc system, limiting the number of permissible i/o contact points, and difficulty in one-by-one correcting of wires in the internal circuit of the equipment, so as to improve the reliability of data transmission and reduce the vulnerability to noise. , the effect of speeding up the transmission

Active Publication Date: 2014-05-27
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a PLC system that can increase the number of input / output (I / O) contact points by combining two methods: directly connecting an I / O module to the PLC and connecting a remote I / O module to the PLC using a network. The system includes a PLC with a first I / O terminal, a remote I / O module with a second I / O terminal, and an extended I / O module with a third I / O terminal. The extended I / O module is mounted on the PLC to receive and transmit data, thereby extending the input / output range of the data.

Problems solved by technology

In order to functionally change the automated equipment comprising the mechanical equipment, there is a difficulty in correcting wires of an internal circuit of the equipment one by one.
However, a block type PLC is problematic in that the number of permissible I / O contact points is limited because of several restrictions including a size of the PLC.
However, this method is also problematic in that the I / O module is directly connected to the data line of the PLC, so that external noise is applied to thereby negatively affect a performance of the entire PLC system.
As the number of connected I / O modules increases, the performance of the data line is deteriorated.
Further, if the I / O module is directly connected to the data line of the PLC, a transmission speed of data and signal is undesirably reduced.

Method used

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Embodiment Construction

[0030]Since the present invention may be variously changed and include several embodiments, particular embodiments shown in the drawings will be described in detail in the detailed description.

[0031]However, it is to be understood that the invention is not limited to the particular embodiments, and various changes, equivalences and substitutions may be made without departing from the scope and spirit of the invention.

[0032]Although the terms “first”, “second”, etc. are used herein to describe various components, these components should not be limited by these terms.

[0033]These terms are only used to distinguish one component from another component. For example, the second component may be designated as the first component without departing from the scope of the invention. Similarly, the first component may be designated as the second component.

[0034]Further, when the term “couple” or “connect” is used in the specification or claims, it is intended to means not only “directly coupled...

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Abstract

Disclosed is a PLC system, the PLC system including a remote I / O module and an extended I / O module, thus configuring a ring topology with the remote I / O module and the extended I / O module.

Description

[0001]Pursuant to 35 U.S.C. §119(a), application claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2010-0116407, filed Nov. 22, 2010, the contents of which is hereby incorporated by reference herein in its entirety.FIELD OF THE DISCLOSURE[0002]The present invention relates to a PLC system.DISCUSSION OF THE RELATED ART[0003]Automated equipment used in traditional industrial settings comprises mechanical equipment using a relay and other devices. In order to functionally change the automated equipment comprising the mechanical equipment, there is a difficulty in correcting wires of an internal circuit of the equipment one by one. In order to solve the problem, a programmable logic controller (PLC) has been proposed.[0004]The PLC usually performs the same role as that of a computer, and is configured to receive a signal from the equipment, process the signal according to contents programmed therein, and then output the processed signal ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06F3/00
CPCG05B2219/1109G05B2219/15072G05B19/054
Inventor SONG, DONG, SHIN
Owner LSIS CO LTD